How to make the Namenode leave safemode?
The following are the various commands to ascertain the type of file system drive in Linux Operating System # df –T # mount # cat /etc/fstab # fsck -N /dev/sdc1 # sudo file -s /dev/sda1 # sudo blkid # sudo lsblk -f
Networking bandwidth testing
Networking : Whats the VLAN ID
#—for all subnets / tcp protocol—# #iptables -A INPUT -m state --state NEW -m tcp -p tcp -s 192.168.122.0/24 --match multiport --dports 22,25,123,53 #—for subnet – 192.168.122.0/24 / tcp protocol —# #iptables -A INPUT -m state --state NEW -m tcp -p tcp -s 192.168.122.0/24 --match multiport --dports 22,25,123,53 Note:...
Finding top ten process on linux with high memory usage.
Here are the steps that I followed in order to fix the timezone sync issue on Cent OS 6 linux:
By default iptables is the firewall that is enabled on linux systems. It is very simple to open ports without totally disabling the iptables service. Here are simple steps: iptables -I INPUT -p tcp --dport <port> -m state --state NEW,ESTABLISHED -j ACCEPT iptables -I OUTPUT -p tcp --sport <port>...
Here are the steps to increase ssh timeout at the server level on Linux OS: These steps are performed on CentOS: Modify the following directives by editing the sshd config file: /etc/ssh/sshd_config TCPKeepAlive yes ClientAliveInterval 30 ClientAliveCountMax 99999 Restart SSH Demon after modifying the config file: [[email protected] ~]#...
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